San Diego Reservoir
High HazardSatisfactory ConditionEmergency Action Plan: Yes
Location
| County | Tuolumne |
| Nearest City | Columbia |
| River/Stream | Tr Mormon Cr |
| Coordinates | 38.03050, -120.38980 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 39 ft |
| Dam Height | 39 ft |
| Dam Length | 155 ft |
| Year Completed | 1860 (166 years old) |
Storage & Hydraulics
| NID Storage | 40 acre-ft |
| Max Storage | 40 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Yosemite Community College District |
| Owner Type | Public Utility |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 09/16/2025 |
| Emergency Action Plan | Yes |